Great for a wilderness guide
I lead week long trips in the Everglades and Ten Thousand Islands. I use sail flow to help with route planning. Is it perfect? Come on, you try to predict windspeed and direction. But Ill tell you this, Ive found using it in conjunction with NOAA weather radio I get a pretty close prediction. Often sail flow is the more accurate of the two. Its my go to app with planning routes in regards to the wind.
nomadruss about
SailFlow: Marine Forecasts